Electrically heated diesel particulate filter

Electric heating – Heating devices – Combined with diverse-type art device

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Details

219202, 219206, 219549, 55DIG10, 55DIG30, H05B 100

Patent

active

057808112

ABSTRACT:
This diesel particulate filter comprises of a composite filter plate composed of thin filter plates formed out of ceramic fiber, and a latticed heating wire, and metal nets. The composite filter plate is bent into a bellows-like structure so as to increase a cross-sectional area of an exhaust gas passage. The latticed heating wire is formed to a current self-controlling type heating wire out of a material containing Ni as a main component the resistance value of which increases as the temperature rises. The particulates collected by the thin filter plates are burnt by supplying an electric current to the latticed heating wire. When a high-temperature region occurs on the thin filter plates, the level of an electric current flowing to the portion of the latticed heating wire which corresponds to the same region is reduced. Consequently, all the regions of the thin filter plates are heated at a uniform temperature, and the melting and breakage of the thin filter plates do not occur.

REFERENCES:
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patent: 3408794 (1968-11-01), Stoddard
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patent: 4397772 (1983-08-01), Noakes et al.
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patent: 5298046 (1994-03-01), Peisert
patent: 5457945 (1995-10-01), Adiletta
patent: 5475203 (1995-12-01), McGaffigan
Engish Translation of Nakanouchi (JP 3-62493).
English Translation of Gurtler (EPO 275272).
"The Random House College Dictionary" (REVD, 1980), p. 721.
Japan Abstract No. 57 163 112, Device for Disposing Particles in Exhaust . . . Same, vol. 7, No. 1, Oct. 7, 1982.
Japan Abstract No. 58 143 815, Filter for Exhaust Gas, vol. 7, No. 259, Aug. 26, 1983.

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